Improvement in locks



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N. PETIRE., or NEW YORIQN. Y.v

Lette/rs Patent No. 95,509, Za-ted October` 5, 1869.

MQ- v IMPROVEMENT IN Locks.

The Schedule referred to in these Letters Patent and making part of the same;

To all whom it may concern Beit known that I, N. PETR, of the city, county, and State of New York, have invented certain new and useful Improvements in Locks; and Iv do hereby declare the following to be a full, clear, and exact description of the same, reference being had to the aocompanying drawings, making a part of this specification, in whichl Figure 1 represents a plan of the interior of the lock.

Figure z represents a sect-ion through the same. l

Figure 3 represents the key of the lock.

Figures 4 and 5 .are detached partsvof` the lock.

Figure 6 represents va modification of one of the parts o f the lock, which will be herein explained.

Similar letters of reference, where they occur in the separate gures, denotelike parts ofthe lock. in all of them. v v

The leading characteristic of this lock consists in the guards' and checks by which any other but the proper key can be inserted, or operate the bolt, and the turning, closing, or changing of these guards, checks, or key-openings or passages, on withdrawing the key from the lock, so that thebolt cannot be reached from the Vexterior by pick to remove' it.

To enable others skilled in the art to make and use this invention, I will proceed to describe the same with` reference to the drawings.

The lock-case A contains al bolt. B, on or with which is cast a yoke, G, that may move with the bolt, and be guided-in its movements by guidesa a in the. case.

WVithin the yoke C a cam, D, is placed, by which. with the key E properly made for releasing and moving it, the bolt can be moved'in or out of the lock-case.

On the case A there is rst a hub, or solid portion, b, which contains two spring-locking pins, c c, and over this .part b the barrel or hollow portion d, of" the eccentric or cam D, is placed, said barrel or hollow portion extending beyond the top of the hub b, and having one permanent division or partition, c, in it, and one removable one, f.

The cover F, of the lock, has an enclosed chamber, g, formedor cast upon it, which, when put upon the case, slips over and entirely covers and conceals the barrel d of the eccentric.

The lower partition, c, has two holes, l 1,- through it, into which the pins- 2 Zot the key E must be made to fit, so as to press down the spring-pins c c, which lock the eccentric to the hub or solid portion b of the case, and without the removal of which the eccentric cannot be turned by the right key, or the bolt moved.

On this partition e there isl supported a tumbleror hub, h, which is bored and slotted, as at t', so that the key may pass through it when in proper position or line, and a spring, j, around it, that by its pressure or friction prevents said hub from turning except when turned by the key. y

Above this tumbler or hub 71, which is 4of consideror rivet, and permanently held in the barrel.

0n top oflthis vpartition f is place'd a second hub or tumbler, h, -in all respects like that below said partii tion j, and distinctly shown in iig. 4, and over all 'is placed the cap or cover g, on the lock-plate. Of course there is a key-opening through the partition f.

The key-pin k is screwed into the hub b, or otherwisefastened to it, and is quite long, extending up through the partitions c f, the hubs h h, and to the exterior' ofthe covering-cylinder g, through the upper end of which .there is also a key-opening.

In thebolt B there is arranged a small spring-bolt, m, which has a knife-edge projection, a, on it, that takes into the notches 0.o in the eccentric, when they comearound opposite to it, and holds the eccentric from turning any further, except when the key is used.

This spring-bolt is prevented from turning in its seat whilst it moves in and out, by a pin, p, the point of which extends into a longitudinal groove, q, in said bolt,as distinctly seen in iig. 5.

The partition c, as shown in iig. 2, is flat and horizontal, `but as a l further protection against the use of' any other but the right key, I-propose to make it concave, asseen in fig. 6, so that thel key must be corre'- spondingly made in order to reach the spring-pins c c, and press them a certain distance down or inwardby the key-pins 2 2, and to a fixed distance, and no further, else the key-pins 'in turn become locks by passing into the hub,and thus prevent itself from being turned, or turning the eccentric, or working the bolt.

It will be perceived vthat there are several barriers or securities in this lock against any but the right key,

yand that very nicely defined in its parts and dimensions, as follows: Y f

rllhe key-pin k is very long, and the bore in the keypod must be-correspondingly long to allow the key to l reach its point ofconuectiou with theeccentric D to turn it, and through it to move the bolt B. The pins 2 2in the key must be accurately set, to meet and operate those c c in the hub b, as accuratelylocated, to unlock the movable from the immovable part of the lock.

The curvature ot' the bottom of the chamber (as seeniin iig. 6) requires a similar curvature in the key, else the latter would not with its pins accurately meet and definitely move the pins c c. y Inrwithdrawing the key, aft-er locking the lock, the lower hub h must be turned until its key-opening matches the key-opening in the partition f, so as to pass through-j or .out of said partition, which is stationside to the intexioris cut o' or'broken by several pieces of solid metal, which prevents powder from being inf troduc'ed into the interior to blow open the lock, and also prevents a pick or feeler` from being introduced' until all these key-openings are in line.

The key is inserted into the lock by pushingit inward, and continuing to turn it as it is so pushed in, and swithdrawn by a reverse movement, and turning it at the same time.

I have mentioned the partition e as being horizontal or'concave, so that the key would have to be made of `a similar form,`to reach the spring-pins that project through it. It might be proper to state it may be convex, or corrugated, either of which extending What I claim therein as new, and desire to securev l by Letters Patent, is

, The combination of the yoked bolt and eccentric,

- with its barrehcontaining the movable and` immovable parts h h and f e, through which the key must pass to :press down the locking-pins, and turn said eccentric, .when arranged and operating substantially as described.

N.V PETRE.

Witnessesz.

J omi WALKER, W. S. LIvmGs'roN, J r. 

